{"id":"CVE-2026-95508","title":"A heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp","summary":"A heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp. When the host is configured with a small interface MTU, a guest-supplied DHCPv6 CLIENTID option or TFTP blksize option can overflow the reply bu…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-787"],"vendor":"Red Hat","product":"libslirp","affected":["libslirp (all versions)","container-tools:rhel8/libslirp (all versions)","libslirp (all versions)","libslirp (all versions)","openshift/ose-rhel-coreos-8 (all versions)","openshift/ose-rhel-coreos-9 (all versions)"],"published":"2026-09-22","updated":"2026-09-22","sourceUpdated":"2026-09-22T19:37:36.747","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-95508","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-95508","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2537748","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"epss":0.00423,"epssPercentile":0.36294,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-22T16:13:20.788433Z"},"ingestedAt":"2026-09-22T09:01:05.606Z","slug":"CVE-2026-95508","body":"## Overview\n\nA heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp. When the host is configured with a small interface MTU, a guest-supplied DHCPv6 CLIENTID option or TFTP blksize option can overflow the reply buffer with attacker-controlled content and length, resulting in denial of service and potentially arbitrary code execution in the host process. The default interface MTU is not affected.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}